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Browsing by Subject "Prototypes"

Now showing 1 - 2 of 2
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    Assessment and Recommendations for the Operation of Standard Sumps as Best Management Practices for Stormwater Treatment (Volume 2)
    (Minnesota Department of Transportation, 2012-05) McIntire, Kurtis D.; Howard, Adam; Mohseni, Omid; Gulliver, John S.
    In order to improve the performance of standard sumps as a best management practice (BMP) in treating stormwater runoff, a baffle was designed to be installed as a retrofit in standard sumps. The retrofit is a porous baffle called “SAFL Baffle”. The effect of the SAFL Baffle on the performance of standard sumps was assessed by conducting laboratory tests on small scale as well as full scale straight flow-through standard sumps equipped with the baffle. In addition, a number of tests were conducted to determine the performance of standard sumps with the SAFL Baffle when the baffle is clogged with debris like trash and vegetation. Furthermore, the performance of two other configurations of the baffle was studied: (1) the SAFL Baffle in a sump with an outlet pipe 90 degrees to the inlet pipe, and (2) the SAFL Baffle in a sump with some water entering the sump through an overhead inlet grate. Standard sumps equipped with the SAFL Baffle were evaluated using two metrics: (1) How well the system captures sediment during low flow conditions (Removal Efficiency Testing), and (2) how well the system retains the previously captured sediment during high flow conditions (Washout Testing). The results of the tests showed that the SAFL Baffle dissipates the energy of water entering the sump and as a result, at low flow rates, it captures sediment better than a standard sump with no baffle. More importantly, at high flow rates, the washout of the previously captured sediment reduces to near zero.
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    Improving the Safety and Efficiency of Roadway Maintenance Phase I: Developing a Robotic Roadway Message Painter Prototype
    (Intelligent Transportation Systems Institute, Center for Transportation Studies, University of Minnesota, 2012-05) Rosandich, Ryan G.
    A large-scale prototype for a robotic roadway message painter was developed, built, and tested. The system is a gantry-style robot capable of painting a four-by-eight-foot area and is based on off-the-shelf linear motion components, readily available motion control hardware, and commercial operator interface software. The system is mounted on a modified trailer that can be manually rolled around for positioning or towed behind a vehicle. The system is equipped with a standard automatic paint head and airless paint pump. Software was developed for the system that enables it to paint a variety of characters and symbols on the roadway. An operator interface was also developed that allows an operator to easily select the painting operation to be conducted and to monitor and control the actual painting process. The software resides in a laptop computer that communicates with the robotic painting system in real-time using a dedicated Ethernet connection. The system was used to determine the feasibility of painting with or without stencils and to determine many design parameters for the eventual development of a commercially viable system for painting symbols and messages on roadways. It is expected that the system will eventually enable states, counties, and municipalities to improve the safety, productivity, and flexibility of their pavement marking operations.